A foam generating device includes a housing defining an agitation chamber and a conditioning chamber. A cartridge assembly arranged within the agitation chamber defines an agitation flow path of the solution to increase a quantity of a gas in the solution. A conditioning assembly arranged within the conditioning chamber defines a tortuous flow path for the solution including a plurality of cylindrical discs configured to sequentially receive the solution. Each of the discs defines a plurality of radial ribs on a first side and on a second side opposite the first side, the first and second sides separated by a floor, and a disc passage defined in the floor. The conditioning assembly is adjustable in order to selectively define the tortuous flow path with a first quantity of radial ribs and second quantity of radial ribs in order to alter the aeration of the solution along the tortuous path.

A device produces fine bubbles that has a simple configuration and that is capable of generating fine bubbles. This fine bubble generation device includes: a porous body having continuous pores; a liquid supply section that supplies a liquid to the porous body and causes the liquid to circulate through the continuous pores; and a liquid discharge section for discharging liquid that has circulated through the continuous pores.

The present disclosure relates to a treatment tool sterilizer with a micro bubble type ozone water supply. The treatment tool sterilizer includes a sterilization tub configured to accommodate an object to be sterilized; a fresh water supply; an ozone water supply including a pressure pump configured to pressurize and transfer fresh water, an ozone generator, a mixer configured to mix fresh water and ozone, and a bubble generator connected to the mixer and configured to pass fresh water and ozone through the bubble generator so as to form micro bubbles; an ultrasonic generator; a drain; a heater mounted on the sterilization tub and configured to apply heat in the sterilization tub; and a controller configured to output a control signal.

A method for producing a composition having a disperse phase with small particle size dispersed in a continuous phase and having greater than 20% by volume of a disperse phase. The method comprising a permeation step, wherein a mixture of a continuous phase liquid and a disperse phase liquid simultaneously permeate a circumferential surface of a cylinder, which is partially or wholly composed of a porous membrane. The cylinder having outlets for the composition in the cross sections of both ends of the cylinder. The porous membrane having an average pore size of not smaller than 5 m at a membrane permeation rate of not lower than 50 m.sup.3/m.sup.2h. The porous membrane cylinder having a longitudinal effective membrane length, L, the internal diameter of the outlets, d, and the membrane permeation rate, F, which satisfy the relationships disclosed herein of L/d and F.

A foam generating device includes a housing defining an agitation chamber and a conditioning chamber. A cartridge assembly arranged within the agitation chamber defines an agitation flow path of the solution to increase a quantity of a gas in the solution. A conditioning assembly arranged within the conditioning chamber defines a tortuous flow path for the solution including a plurality of cylindrical discs configured to sequentially receive the solution. Each of the discs defines a plurality of radial ribs on a first side and on a second side opposite the first side, the first and second sides separated by a floor, and a disc passage defined in the floor. The conditioning assembly is adjustable in order to selectively define the tortuous flow path with a first quantity of radial ribs and second quantity of radial ribs in order to alter the aeration of the solution along the tortuous path.